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These compounds typically react as nucleophiles, e.g. with alkyl halides (R'−X) to give selenonium salts [RR'R"Se] + X −. Divalent selenium can also interact with soft heteroatoms to form hypervalent selenium centers. [6] They also react in some circumstances as electrophiles, e.g. with organolithium reagents (R'Li) to the ate complex R ...
Selenium is found in metal sulfide ores, where it substitutes for sulfur. Commercially, selenium is produced as a byproduct in the refining of these ores. Minerals that are pure selenide or selenate compounds are rare. The chief commercial uses for selenium today are glassmaking and pigments. Selenium is a semiconductor and is used in photocells.
Ketones with two available α-methylene positions react more quickly at the least hindered position.: [1] Allylic oxidation can be predicted by the substitution pattern on the olefin. In the case of 1,2-disubstituted olefins, reaction rates follow CH > CH 2 > CH 3: Geminally-substituted olefins react in the same order of reaction rates as above ...
The current EAR for selenium for people ages 14 and up is 45 μg/day. The RDA is 55 μg/day. RDAs are higher than EARs so as to identify amounts that will cover people with higher-than-average requirements. RDA for pregnancy is 60 μg/day. RDA for lactation is 70 μg/day. For children ages 1–13 years, the RDA increases with age from 20 to 40 ...
Selenium monochloride or diselenium dichloride is an inorganic compound with the formula Se 2 Cl 2. Although a common name for the compound is selenium monochloride, reflecting its empirical formula , IUPAC does not recommend that name, instead preferring the more descriptive diselenium dichloride.
The binary potassium-oxygen compounds react with water forming KOH. KOH is a strong base. Illustrating its hydrophilic character, as much as 1.21 kg of KOH can dissolve in a single liter of water. [26] [27] Anhydrous KOH is rarely encountered.
Silver selenide (Ag 2 Se) is the reaction product formed when selenium toning analog silver gelatine photo papers in photographic print toning.The selenium toner contains sodium selenite (Na 2 SeO 3) as one of its active ingredients, which is the source of the selenide (Se 2−) anion combining with the silver in the toning process.
When inhaled, plutonium can pass into the bloodstream. Once in the bloodstream, plutonium moves throughout the body and into the bones, liver, or other body organs. Plutonium that reaches body organs generally stays in the body for decades and continues to expose the surrounding tissue to radiation and thus may cause cancer.